| carpenteria | (noun) California evergreen shrub having glossy opposite leaves and terminal clusters of a few fragrant white flowers | Synonyms: Carpenteria californica |
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| cassia | (noun) any of various trees or shrubs of the genus Cassia having pinnately compound leaves and usually yellow flowers followed by long seedpods | - |
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| (noun) Chinese tree with aromatic bark; yields a less desirable cinnamon than Ceylon cinnamon | Synonyms: cassia-bark tree, Cinnamomum cassia |
| catamenia | (noun) the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause | Synonyms: flow, menses, menstruation, menstruum, period |
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| cataphasia | (noun) a speech disorder in which the same word is repeated several times in succession | - |
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| cataplasia | (noun) (biology) degenerative reversion of cells or tissue to a less differentiated or more primitive form | - |
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| catathymia | (noun) A state in which mental processes are under the control of the emotions. | - |
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| catatonia | (noun) a form of schizophrenia characterized by a tendency to remain in a fixed stuporous state for long periods; the catatonia may give way to short periods of extreme excitement | Synonyms: catatonic schizophrenia, catatonic type schizophrenia |
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| (noun) extreme tonus; muscular rigidity; a common symptom in catatonic schizophrenia | - |
| causalgia | (noun) a burning pain in a limb along the course of a peripheral nerve; usually associated with skin changes | - |
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| cecropia | (noun) North American silkworm moth; larvae feed on the leaves of forest trees | Synonyms: cecropia moth, Hyalophora cecropia |
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| cephalalgia | (noun) pain in the head caused by dilation of cerebral arteries or muscle contractions or a reaction to drugs | Synonyms: head ache, headache |
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| ceratozamia | (noun) a small cycad of the genus Ceratozamia having a short scaly woody trunk and fernlike foliage and woody cones; Mexico | - |
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| cercaria | (noun) tadpole-shaped parasitic larva of a trematode worm; tail disappears in adult stage | - |
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| chiralgia | (noun) a pain in the hand that is not traumatic | - |
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| chlamydia | (noun) coccoid rickettsia infesting birds and mammals; cause infections of eyes and lungs and genitourinary tract | - |
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| (noun) a sexually transmitted infection caused by bacteria of the genus Chlamydia | - |
| chromaesthesia | (noun) a form of synesthesia in which nonvisual stimulation results in the experience of color sensations | Synonyms: chromesthesia |
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| chromesthesia | (noun) a form of synesthesia in which nonvisual stimulation results in the experience of color sensations | Synonyms: chromaesthesia |
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| cineraria | (noun) herb of Canary Islands widely cultivated for its blue or purple or red or variegated daisylike flowers | Synonyms: Pericallis cruenta, Senecio cruentus |
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| claustrophobia | (noun) a morbid fear of being closed in a confined space | - |
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| clintonia | (noun) any temperate liliaceous plant of the genus Clintonia having broad basal leaves and white or yellowish or purplish flowers followed by blue or black berries | Synonyms: Clinton's lily |
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| clostridia | (noun) spindle-shaped bacterial cell especially one swollen at the center by an endospore | Synonyms: clostridium |
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| clusia | (noun) an aromatic tree of the genus Clusia having large white or yellow or pink flowers | - |
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| cobia | (noun) large dark-striped tropical food and game fish related to remoras; found worldwide in coastal to open waters | Synonyms: Rachycentron canadum, sergeant fish |
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| coprolalia | (noun) an uncontrollable use of obscene language; often accompanied by mental disorders | - |
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| coprophagia | (noun) eating feces; in human a symptom of some kinds of insanity | Synonyms: coprophagy |
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| cornucopia | (noun) the property of being extremely abundant | Synonyms: profuseness, profusion, richness |
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| (noun) a goat's horn filled with grain and flowers and fruit symbolizing prosperity | Synonyms: horn of plenty |
| costalgia | (noun) pain in the chest caused by inflammation of the muscles between the ribs | Synonyms: pleuralgia, pleurodynia |
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| costia | (noun) a flagellate that is the cause of the frequently fatal fish disease costiasis | Synonyms: Costia necatrix |
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| crotalaria | (noun) any of various plants of the genus Crotalaria having inflated pods within which the seeds rattle; used for pasture and green-manure crops | Synonyms: rattlebox |
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| cryaesthesia | (noun) hypersensitivity to cold | Synonyms: cryesthesia |
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| cryesthesia | (noun) hypersensitivity to cold | Synonyms: cryaesthesia |
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| cryoanaesthesia | (noun) insensibility resulting from cold | Synonyms: cryoanesthesia |
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| cryoanesthesia | (noun) insensibility resulting from cold | Synonyms: cryoanaesthesia |
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| cryophobia | (noun) a morbid fear of freezing | - |
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| cyanobacteria | (noun) predominantly photosynthetic prokaryotic organisms containing a blue pigment in addition to chlorophyll; occur singly or in colonies in diverse habitats; important as phytoplankton | Synonyms: blue-green algae |
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| cyberphobia | (noun) irrational fear of computers or technology | - |
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| cyclopaedia | (noun) a reference work (often in several volumes) containing articles on various topics (often arranged in alphabetical order) dealing with the entire range of human knowledge or with some particular specialty | Synonyms: cyclopedia, encyclopaedia, encyclopedia |
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| cyclopedia | (noun) a reference work (often in several volumes) containing articles on various topics (often arranged in alphabetical order) dealing with the entire range of human knowledge or with some particular specialty | Synonyms: cyclopaedia, encyclopaedia, encyclopedia |
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| cyclopia | (noun) a developmental abnormality in which there is only one eye | - |
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| cyclothymia | (noun) a mild bipolar disorder that persists over a long time | Synonyms: cyclic disorder, cyclothymic disorder |
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| cynophobia | (noun) a morbid fear of dogs | - |
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| cypripedia | (noun) a plant or flower of the genus Cypripedium | - |
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| cystoplegia | (noun) paralysis of the urinary bladder | Synonyms: cystoparalysis |
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| cytopenia | (noun) a deficiency of some cellular element of the blood | - |
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| dahlia | (noun) any of several plants of or developed from the species Dahlia pinnata having tuberous roots and showy rayed variously colored flower heads; native to the mountains of Mexico and Central America and Colombia | Synonyms: Dahlia pinnata |
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| daphnia | (noun) minute freshwater crustacean having a round body enclosed in a transparent shell; moves about like a flea by means of hairy branched antennae | Synonyms: water flea |
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| davallia | (noun) any fern of the genus Davallia; having scaly creeping rhizomes | - |
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| decalcomania | (noun) the art of transferring designs from specially prepared paper to a wood or glass or metal surface | - |
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| (noun) either a design that is fixed to some surface or a paper bearing the design which is to be transferred to the surface | Synonyms: decal |
| dementia | (noun) mental deterioration of organic or functional origin | Synonyms: dementedness |
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| deuteranopia | (noun) dichromacy characterized by a lowered sensitivity to green light resulting in an inability to distinguish green and purplish-red | Synonyms: Daltonism, green-blindness |
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| deutzia | (noun) any of various shrubs of the genus Deutzia having usually toothed opposite leaves and shredding bark and white or pink flowers in loose terminal clusters | - |
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| dextrocardia | (noun) abnormal condition where the heart is located toward the right side of the chest | - |
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| diapensia | (noun) any boreal low-growing evergreen plant of the genus Diapensia | - |
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| dichromatopsia | (noun) a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision) | Synonyms: dichromacy, dichromasy, dichromatism, dichromia |
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| dichromia | (noun) a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision) | Synonyms: dichromacy, dichromasy, dichromatism, dichromatopsia |
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| differentia | (noun) distinguishing characteristics (especially in different species of a genus) | - |
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| difflugia | (noun) a protozoan with an ovoid shell of cemented sand grains | - |
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| dillenia | (noun) any of several evergreen trees or shrubs of the genus Dillenia grown for their foliage and nodding flowers resembling magnolias which are followed by fruit that is used in curries and jellies and preserves | - |
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| diphtheria | (noun) acute contagious infection caused by the bacterium Corynebacterium diphtheriae; marked by the formation of a false membrane in the throat and other air passages causing difficulty in breathing | - |
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| diplegia | (noun) paralysis of corresponding parts on both sides of the body | - |
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| diplopia | (noun) visual impairment in which an object is seen as two objects | Synonyms: double vision |
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| dipsomania | (noun) an intense persistent desire to drink alcoholic beverages to excess | Synonyms: alcoholism, potomania |
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| doodia | (noun) any fern of the genus Doodia having pinnate fronds with sharply dentate pinnae | Synonyms: rasp fern |
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| dysaphia | (noun) a disorder in the sense of touch | - |
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| dysarthria | (noun) impaired articulatory ability resulting from defects in the peripheral motor nerves or in the speech musculature | - |
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| dyscalculia | (noun) impaired ability to learn grade-appropriate mathematics | - |
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| dyschezia | (noun) difficulty in defecating (usually as a consequence of long continued voluntary suppression of the urge to defecate) | - |
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| dyscrasia | (noun) an abnormal or physiologically unbalanced state of the body | - |
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| dysgraphia | (noun) impaired ability to learn to write | - |
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| dyskinesia | (noun) abnormality in performing voluntary muscle movements | - |
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| dyslexia | (noun) impaired ability to learn to read | - |
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| dyslogia | (noun) impaired ability to express ideas verbally; usually resulting from difficulties of reasoning (as in feeblemindedness or certain psychoses) | - |
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| dysomia | (noun) impairment of the sense of smell | - |
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| dysosmia | (noun) a disorder in the sense of smell | Synonyms: olfactory impairment, parosamia |
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| dyspepsia | (noun) a disorder of digestive function characterized by discomfort or heartburn or nausea | Synonyms: indigestion, stomach upset, upset stomach |
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| dysphagia | (noun) condition in which swallowing is difficult or painful | - |
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| dysphasia | (noun) an impairment of language (especially speech production) that is usually due to brain damage | - |
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| dysphonia | (noun) speech disorder attributable to a disorder of phonation | - |
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| dysphoria | (noun) abnormal depression and discontent | - |
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| dysplasia | (noun) abnormal development (of organs or cells) or an abnormal structure resulting from such growth | - |
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| dyssynergia | (noun) inability to coordinate voluntary muscle movements; unsteady movements and staggering gait | Synonyms: ataxia, ataxy, motor ataxia |
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| dysthymia | (noun) mild chronic depression | Synonyms: dysthymic depression |
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| dystopia | (noun) a work of fiction describing an imaginary place where life is extremely bad because of deprivation or oppression or terror | - |
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| (noun) state in which the conditions of life are extremely bad as from deprivation or oppression or terror | - |
| dysuria | (noun) painful or difficult urination | - |
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| echolalia | (noun) (psychiatry) mechanical and meaningless repetition of the words of another person (as in schizophrenia) | - |
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| (noun) an infant's repetition of sounds uttered by others | - |
| eclampsia | (noun) a toxic condition characterized by convulsions and possibly coma during or immediately after pregnancy | - |
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| ectasia | (noun) dilatation or distension of a hollow organ | Synonyms: ectasis |
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| ectopia | (noun) abnormal position of a part or organ (especially at the time of birth) | - |
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| egomania | (noun) an intense and irresistible love for yourself and concern for your own needs | - |
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| eimeria | (noun) parasitic on the digestive epithelium of vertebrates and higher invertebrates | Synonyms: coccidium |
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| elsholtzia | (noun) any of various aromatic herbs of the genus Elsholtzia having blue or purple flowers in one-sided spikes | - |
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| emmetropia | (noun) (ophthalmology) the normal refractive condition of the eye in which there is clear focus of light on the retina | - |
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| encyclopaedia | (noun) a reference work (often in several volumes) containing articles on various topics (often arranged in alphabetical order) dealing with the entire range of human knowledge or with some particular specialty | Synonyms: cyclopaedia, cyclopedia, encyclopedia |
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| encyclopedia | (noun) a reference work (often in several volumes) containing articles on various topics (often arranged in alphabetical order) dealing with the entire range of human knowledge or with some particular specialty | Synonyms: cyclopaedia, cyclopedia, encyclopaedia |
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| endodontia | (noun) the branch of dentistry dealing with diseases of the dental pulp | Synonyms: endodontics |
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| engelmannia | (noun) common erect hairy perennial of plains and prairies of southern and central United States having flowers that resemble sunflowers | - |
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| enterobacteria | (noun) rod-shaped Gram-negative bacteria; most occur normally or pathogenically in intestines of humans and other animals | Synonyms: enteric bacteria, enterics, entric |
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| enterotoxemia | (noun) a disease of cattle and sheep that is attributed to toxins absorbed from the intestines | - |
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| entomophobia | (noun) a morbid fear of insects | - |
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| eosinopenia | (noun) a decrease in the number of eosinophils in the blood | - |
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| eosinophilia | (noun) a symptom of allergic states; increased eosinophils in the blood | - |
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